Apartment House for Interbau Exhibition, Berlin-Hansaviertel, 1955-1957: Door schedule

Graphite, black ink, and yellow chalk on darkened off-white wove paper

Blue, purple and brown crayon on paper

Watercolor on off-white wove paper

Black ink on white wove paper

Watercolor and graphite on white wove paper

Mixed media on paper

Graphite on off-white wove paper

Charcoal, white pencil, red watercolor (or ink) on off-white wove paper

Black ink on off-white wove paper

Graphite on cream wove paper laid down to off-white wove paper

Watercolor over graphite on buff wove paper

Graphite on off-white wove paper